LONDON , England -LRB- CNN -RRB- -- A fan of English football club Arsenal has been injured after the bus he and other supporters were traveling in was ambushed before the sides ' Champions League clash in Rome , Wednesday night .

Winners : Arsenal beat Roma 7-6 on penalties after one of their fans was injured before the game .

A spokesman from the British Embassy in Rome told CNN the fan was understood to have suffered wounds to the leg -- but it was unsure if he had been stabbed or injured by broken glass .

The spokesman said the mini bus , which was not an official tour bus , became lost near the stadium and `` ended up at the wrong part of the ground '' .

Roma fans nearby set about attacking the bus , the spokesman said .

`` They smashed the windows and then one of them managed to get on the bus . This appears to be where the injury occurred , '' he said .

Police were quick to arrive and the bus managed to move on to safety , where the fan was treated for the wound , he said .

The visiting side went on to win the tie 7-6 on penalties after Roma won the game 1-0 , leaving the two-match tie level 1-1 on aggregate .

Arsenal had distributed a booklet to its estimated 3,500 traveling fans warning that they were `` at risk '' if they traveled alone to the Stadio Olimpico .

The booklet warned supporters to stay clear of areas that were known gathering points of Roma 's `` Ultra '' fans -- a group known for creating conflict with rival supporters .

Last month ten football fans were shot dead in the south of Nigeria on the way to support their team . The victims were traveling supporters of the Ocean Boys Football Club in Nigeria .

Also in February , one fan was killed and at least 40 more injured when violence broke out at football matches across Brazil .

In 2007 , Manchester United fans were injured after violence in two separate incidents with Roma fans when the teams met in Rome .

In 2003 five England fans suffered gunshot wounds during a violent incident in Zurich , Switzerland , before the side played a Euro 2004 qualifier with Liechtenstein .

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Fan injured during ambush on bus before Champions League game in Rome

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Arsenal bus attacked when it arrives at wrong part of Stadio Olimpico

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Windows on bus smashed by Roma fans and one fan enters bus

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Arsenal go on to win match 7-6 on penalties after it finishes 1-1 on aggregate